Multi-criteria assessment approach of slow-moving urban landslide hazard: the case of Moulay Yacoub, Morocco

Abstract

Since many decades, the town of Moulay Yacoub (MY) has undergone an intensification of its urbanization to meet the demands of rental housing for the visitors of the hydrothermal springs, which is considered as the only attraction of the town. Unfortunately, the majority of the buildings, both private and public, suffer from varying levels of damages where the lithological and geomorphic field features are to blame, without omitting the anthropogenic effects. In fact, the town is built on a marly hill conducive to slope movements, ranging from shallow solifluctions to large landslides, besides the swelling/shrinkage behaviour of these marls. The paper presents a multi-source approach to investigate the activity and the interactions of slow urbanized landslides and expansive soils within the urban perimeter of Moulay Yacoub. Indeed, the desiccation cracks of marly soils reveal their expansive behaviour, also attested by the swelling values. The other geotechnical parameters obtained from laboratory tests show that the shallow marls samples are severely weathered compared to those of the compacted deep ones. The Borehole data and seismic noise survey allows the detection of several impedance contrasts corresponding to the shallow weathered-deep marls interfaces which in some cases represent the rupture surfaces of gravitational processes. The very slow but perennial activities of the later are attested by the inclinometers, the PS-InSAR monitoring and building damages. The case study provides a good opportunity to highlight the complementarity of the multi-source tasks which stand as a further contribution to fostering this kind of integrated approaches at the slope scale.

Landslide Movement of Bendungan District Trenggalek Using an Artificial Neural Network

“…According to local residents, apart from the occurrence of moderate-to-severe landslides, micro or small-scale (Daviran et al, 2022;Fu et al, 2022). Fieldwork and surveys were carried out to collect landslide hazard parameters, namely soil texture class and soil extensibility or COLE Index and landslide occurrence (Dou et al, 2015;Obda et al, 2022). The parameters were sampled based on the landform variability in the study area.…”

Coastal rocky slopes instability analysis and landslide frequency-area distribution alongside the road network in west Mediterranean context (Northern of Morocco)

“…In mountainous region, the inappropriate modi cation adopted on natural slope condition for the purpose of construction and widening of the transportation network affects the stability of the cut slope (R. Singh et al, 2013). Hence, varying levels of damage to buildings and road network have been identi ed due to the geological settings of the Rif chain (El Kharim et al, 2021;Obda et al, 2022). Furthermore, about 50% of the total budget allocated to the PDPW (Provincial Directorates of Public Works) of the Ri an provinces has been destined to the reinforcement slopes, support, and rehabilitation of roads following the occurrence of many landslides (Dardori, 1995;El Kharim, 2002).…”